U.S. patent number 6,220,770 [Application Number 08/328,864] was granted by the patent office on 2001-04-24 for camera adapted to use a film cartridge having a movable light shield door.
This patent grant is currently assigned to Canon Kabushiki Kaisha. Invention is credited to Hiroshi Sakurai.
United States Patent |
6,220,770 |
Sakurai |
April 24, 2001 |
**Please see images for:
( Certificate of Correction ) ** |
Camera adapted to use a film cartridge having a movable light
shield door
Abstract
A camera or apparatus adapted to use an image recording medium
cartridge having a cover for allowing an image recording medium to
exit from or withdraw into the image recording medium cartridge, or
a device adapted in the camera or apparatus, includes inhibition
means for inhibiting the cartridge from being unloaded from the
camera or apparatus when the cover of the cartridge loaded in the
camera or apparatus is open, and disabling means for disabling an
operation of the inhibition means when the cover of the cartridge
loaded in the camera or apparatus is open.
Inventors: |
Sakurai; Hiroshi (Kawasaki,
JP) |
Assignee: |
Canon Kabushiki Kaisha (Tokyo,
JP)
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Family
ID: |
17782389 |
Appl.
No.: |
08/328,864 |
Filed: |
October 26, 1994 |
Foreign Application Priority Data
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Oct 29, 1993 [JP] |
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5-292482 |
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Current U.S.
Class: |
396/514;
396/538 |
Current CPC
Class: |
G03B
17/30 (20130101); G03B 2217/268 (20130101) |
Current International
Class: |
G03B
17/30 (20060101); G03B 017/26 (); G03B
017/02 () |
Field of
Search: |
;354/288,173.1
;396/513,514,516,536,537,538 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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0 545 098 |
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Jun 1993 |
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EP |
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1-191836 |
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Aug 1989 |
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JP |
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1-191837 |
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Aug 1989 |
|
JP |
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5-150344 |
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Jun 1993 |
|
JP |
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Other References
Official Communication dated Jan. 29, 1999. .
Patent Abstract of Japan, vol. 13, No. 482; (P-953) Nov. 2, 1989.
.
Patent Abstract of Japan. vol. 17, No. 539; (P-1621) Sep. 28, 1993,
Same As Abstract for Doc. 5-150344 Listed Above..
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Primary Examiner: Adams; Russell
Assistant Examiner: Mahoney; Christopher E.
Attorney, Agent or Firm: Fitzpatrick, Cella, Harper &
Scinto
Claims
What is claimed is:
1. A camera adapted to use a cartridge including an image recording
medium, the cartridge having a cartridge cover that opens and
closes to permit the image recording medium to exit from and
withdraw into the cartridge, the camera comprising:
operation means for causing the cartridge cover of a cartridge
loaded in the camera to open to an open state;
inhibition means for selectively inhibiting an unloading operation
of the cartridge from the camera;
actuation means operable in a first state, in which operation of
said actuation means simultaneously actuates said operation means
to cause the cartridge cover to open to the open state and actuates
said inhibition means to inhibit an unloading operation of the
cartridge from the camera, and operable in a second state, in which
such operation of said actuation means does not actuate said
inhibition means; and
state selection means for selecting operation of said actuation
means in the first state or the second state.
2. A camera according to claim 1, wherein the image recording
medium comprises a film.
3. A camera according to claim 1, wherein said inhibition means
comprises means for inhibiting an opening operation of a camera
body cover which allows the cartridge to be unloaded from the
camera.
4. A camera according to claim 1, wherein said inhibition means
comprises release means for releasing an operation of said
inhibition means in connection with a closing operation of the
cartridge cover of a cartridge loaded in the camera.
5. A camera according to claim 1, wherein said inhibition means
comprises bias means for biasing said state selection means to
select operation of said actuation means in the first state.
6. A camera according to claim 5, wherein said bias means includes
a spring for biasing said disabling means in an inoperative
state.
7. A camera according to claim 1, wherein the cartridge includes a
first operation portion and a second operation portion functionally
connected with the cartridge cover of the cartridge, the camera
further comprising:
driving means for driving the first operation portion to
selectively perform one of an opening operation and a closing
operation of the cartridge cover of the cartridge,
whereby a driving operation of said first operation portion by said
driving means so as to selectively perform one of an opening
operation and a closing operation of the cartridge cover of the
cartridge thereby also causes a driving operation of the second
operation portion so as to selectively perform one of an inhibiting
operation and a release operation of the inhibition means,
respectively.
8. A camera adapted to use a cartridge including an image recording
medium, the cartridge having a cartridge cover and first and second
operation portions functionally connected with respective ends of
the cartridge cover, the camera comprising:
driving means for driving the first operation portion to
selectively perform one of an opening operation and a closing
operation of the cartridge cover of the cartridge;
inhibition means operable in a first state, for inhibiting at least
one of a loading operation of a cartridge into the camera and an
unloading operation of the cartridge from the camera, and operable
in a second state, in which said inhibition means does not inhibit
a loading operation or an unloading operation of the cartridge;
and
operation means, functionally connectable to said second operation
portion, for performing a changeover operation between the first
state and the second state of said inhibition means,
whereby a driving operation of said first operation portion by said
driving means so as to selectively perform one of an opening
operation and a closing operation of the cartridge cover of the
cartridge thereby also causes a driving operation of the second
operation portion so as to selectively perform a changeover
operation between the first state and the second state of said
inhibition means, respectively.
9. A camera according to claim 8, wherein said inhibition means
comprises means for inhibiting an opening operation of a camera
body cover for allowing at least one of the loading operation and
the unloading operation of a cartridge with respect to the
camera.
10. An apparatus adapted to use a cartridge including an image
recording medium, the cartridge having a cartridge cover that opens
and closes to permit the image recording medium to exit from and
withdraw into the cartridge, the apparatus comprising:
operation means for causing the cartridge cover of a cartridge
loaded in the apparatus to open to an open state;
inhibition means for selectively inhibiting an unloading operation
of the cartridge from the apparatus;
actuation means operable in a first state, in which operation of
said actuation means simultaneously actuates said operation means
to cause the cartridge cover to open to the open state and actuates
said inhibition means to inhibit an unloading operation of the
cartridge from the camera, and operable in a second state, in which
such operation of said actuation means does not actuate said
inhibition means; and
state selection means for selecting operation of said actuation
means in the first state or the second state.
11. An apparatus according to claim 10, wherein the image recording
medium comprises a film.
12. An apparatus according to claim 10, wherein said inhibition
means comprises means for inhibiting an opening operation of an
apparatus body cover which allows the cartridge to be unloaded from
the apparatus.
13. An apparatus according to claim 10, wherein said inhibition
means comprises release means for releasing an operation of the
inhibition means in connection with a closing operation of the
cartridge cover of a cartridge loaded in the apparatus.
14. An apparatus according to claim 10, wherein said inhibition
means comprises bias means for biasing said state selection means
to select operation of said actuation means in the first state.
15. An apparatus according to claim 14, wherein said bias means
includes a spring for biasing said disabling means in an
inoperative state.
16. An apparatus according to claim 10, wherein the cartridge
includes a first operation portion and a second operation portion
functionally connected with the cartridge cover of the cartridge,
the apparatus further comprising:
driving means for driving the first operation portion to
selectively perform one of an opening operation and a closing
operation of the cartridge cover of the cartridge,
whereby a driving operation of said first operation portion by said
driving means so as to selectively perform one of an opening
operation and a closing operation of the cartridge cover of the
cartridge thereby also causes a driving operation of the second
operation portion so as to selectively perform one of an inhibiting
operation and a release operation of the inhibition means,
respectively.
17. An apparatus adapted to use a cartridge including an image
recording medium, the cartridge having a cartridge cover that opens
and closes to allow the image recording medium to exit from or
withdraw into the cartridge, and having first and second operation
portions functionally connected with respective ends of the
cartridge cover, the apparatus comprising:
driving means for driving the first operation portion to
selectively perform one of an opening operation and a closing
operation of the cartridge cover of the cartridge;
inhibition means operable in a first state, for inhibiting at least
one of a loading operation of a cartridge in the apparatus and an
unloading operation of the cartridge from the apparatus, and
operable in a second state, in which said inhibition means does not
inhibit the loading operation or the unloading operation of the
cartridge; and
operation means, functionally connectable to said second operation
portion, for performing a changeover operation between the first
state and the second state of said inhibition means,
whereby a driving operation of said first operation portion by said
driving means so as to selectively perform one of an opening
operation and a closing operation of the cartridge cover of the
cartridge thereby also causes a driving operation of the second
operation portion so as to selectively perform a changeover
operation between the first state and the second state of said
inhibition means, respectively.
18. An apparatus according to claim 17, wherein said inhibition
means comprises means for inhibiting an opening operation of an
apparatus body cover for allowing at least one of the loading
operation and the unloading operation of a cartridge with respect
to the apparatus.
19. An apparatus adapted to use a cartridge including an image
recording medium, the cartridge having a light shield portion
movable between an open state and a closed state to permit the
image recording medium to exit from or withdraw into the cartridge,
the apparatus comprising:
operation means for causing the light shield of a cartridge loaded
in the apparatus to move to an open state;
inhibition means for selectively inhibiting an unloading operation
of the cartridge from the apparatus when the light shield portion
of a cartridge loaded in the apparatus is in the open state;
actuation means operable in a first state, in which operation of
said actuation means simultaneously actuates said operation means
to cause the light shield to move to the open state and actuates
said inhibition means to inhibit an unloading operation of the
cartridge from the apparatus, and operable in a second state, in
which such operation of said actuation means does not actuate said
inhibition means; and
state selection means for selecting operation of said actuation
means in the first state or the second state.
20. An apparatus according to claim 19, wherein the image recording
medium comprises a film.
21. An apparatus according to claim 19, wherein said inhibition
means comprises means for inhibiting an opening operation of an
apparatus body cover which allows the cartridge to be unloaded from
the apparatus.
22. An apparatus according to claim 19, wherein said inhibition
means comprises release means for releasing an operation of said
inhibition means in conjunction with a closing operation of the
light shield portion of the cartridge loaded in the apparatus.
23. An apparatus according to claim 19, wherein said inhibition
means comprises bias means for biasing said state selection means
in the first state.
24. An apparatus according to claim 23, wherein said bias means
includes a spring for biasing said disabling means in an
inoperative state.
25. An apparatus according to claim 19, wherein the cartridge
includes a first operation portion and a second operation portion
functionally connected with the light shield portion of the
cartridge, said apparatus further comprising:
driving means for driving the first operation portion to
selectively perform one of an opening operation and a closing
operation of the light shield portion of the cartridge,
whereby a driving operation of said first operation portion by said
driving means so as to selectively perform one of an opening
operation and a closing operation of the cartridge cover of the
cartridge thereby also causes a driving operation of the second
operation portion so as to selectively perform one of an inhibiting
operation and a release operation of the inhibition means,
respectively.
26. An apparatus adapted to use a cartridge including an image
recording medium, the cartridge having a light shield portion for
shielding the image recording medium from external light and having
first and second operation portions functionally connected with
respective ends of the light shield portion, the apparatus
comprising:
driving means for driving the first operation portion to
selectively perform one of an opening operation and a closing
operation of the light shield portion of the cartridge;
inhibition means operable in a first state, for inhibiting at least
one of a loading operation of a cartridge in the apparatus and an
unloading operation of a cartridge from the apparatus, and operable
in a second state, in which said inhibition means does not inhibit
a loading operation or an unloading operation of the cartridge;
and
operation means, functionally connectable to said second operation
portion, for performing a changeover operation between the first
state and the second state of said inhibition means,
whereby a driving operation of said first operation portion by said
driving means so as to selectively perform one of an opening
operation and a closing operation of the light shield of the
cartridge thereby also causes a driving operation of the second
operation portion so as to selectively perform a changeover
operation between the first state and the second state of said
inhibition means, respectively.
27. An apparatus according to claim 26, wherein said inhibition
means comprises means for inhibiting an opening operation of an
apparatus body cover for allowing at least one of the loading
operation and the unloading operation of a cartridge with respect
to the apparatus.
28. A unit applied to at least one of a camera and an apparatus
adapted to use a cartridge including an image recording medium, the
cartridge having a light shield portion movable between an open
state and a closed state to permit the image recording medium to
exit from or withdrawn into the cartridge, the unit comprising:
operation means for causing the light shield of a cartridge loaded
in the camera or apparatus to move to an open state;
inhibition means for selectively inhibiting an unloading operation
of the cartridge from the unit when the light shield portion of a
cartridge loaded in the camera or apparatus is in the open state;
and
actuation means operable in a first state, in which operation of
said actuation means simultaneously actuates said operation means
to cause the light shield to move to the open state and actuates
said inhibition means to inhibit an unloading operation of the
cartridge from the camera or apparatus, and operable in a second
state, in which such operation of said actuation means does not
actuate said inhibition means; and
state selection means for selecting operation of said actuation
means in the first state or the second state.
29. A unit according to claim 28, wherein the image recording
medium comprises a film.
30. A unit according to claim 28, wherein said inhibition means
comprises means for inhibiting an opening operation of a unit body
cover which allows the cartridge to be unloaded from the camera or
apparatus.
31. A unit according to claim 28, wherein said inhibition means
comprises release means for releasing an operation of said
inhibition means in conjunction with a closing operation of the
light shield portion of the cartridge loaded in the camera or
apparatus.
32. A unit according to claim 28, wherein said inhibition means
comprises bias means for biasing said state selection means in the
first state.
33. A unit according to claim 32, wherein said bias means includes
a spring for biasing said disabling means in an inoperative
state.
34. A unit according to claim 28, wherein the cartridge includes a
first operation portion and a second operation portion functionally
connected with respective ends of the light shield portion of the
cartridge, said unit further comprising:
driving means for driving the first operation portion to
selectively perform one of an opening operation and a closing
operation of the light shield portion of the cartridge,
whereby a driving operation of said first operation portion by said
driving means so as to selectively perform one of an opening
operation and a closing operation of the light shield of the
cartridge thereby also causes a driving operation of the second
operation portion so as to selectively perform one of an inhibiting
operation and a release operation of the inhibition means,
respectively.
35. A unit applied to at least one of a camera and an apparatus
adapted to use a cartridge including an image recording medium, the
cartridge having a light shield portion for shielding the image
recording medium from external light and having first and second
operation portions functionally connected with respective ends of
the light shield portion, the unit comprising:
driving means for driving the first operation portion to
selectively perform one of an opening operation and a closing
operation of the light shield portion of the cartridge;
inhibition means operable in a first state, for inhibiting at least
one of a loading operation of a cartridge in the camera or
apparatus and an unloading operation of a cartridge from the camera
or apparatus, and operable in a second state, in which said
inhibition means does not inhibit a loading operation or an
unloading operation of the cartridge; and
operation means, functionally connectable to said second operation
portion, for performing a changeover operation between the first
state and the second state of said inhibition means;
whereby a driving operation of said first operation portion by said
driving means so as to selectively perform one of an opening
operation and a closing operation of the light shield of the
cartridge thereby also causes a driving operation of the second
operation portion so as to selectively perform a changeover
operation between the first state and the second state of said
inhibition means, respectively.
36. A unit according to claim 35, wherein said inhibition means
comprises means for inhibiting an opening operation of a unit body
cover for allowing at least one of the loading operation and the
unloading operation of a cartridge with respect to the camera or
apparatus.
37. A camera adapted to use a cartridge including an image
recording medium, the cartridge having a cartridge cover and first
and second operation portions functionally connected with
respective ends of the cartridge cover, the camera comprising:
a drive device that drives the first operation portion to
selectively perform one of an opening operation and a closing
operation of the cartridge cover of the cartridge; and
an operation member that performs a predetermined operation, said
operation member being driven by a driving operation of the second
operation portion, which is driven by the first operation portion
driven by said drive device.
38. A camera according to claim 37, wherein said operation member
comprises a prevention device that prevents at least one of a
loading operation and an unloading operation of the cartridge with
respect to the camera.
39. A camera according to claim 38, wherein said prevention device
comprises a tab that prevents an opening of a camera body cover for
allowing at least one of the loading operation and the unloading
operation of a cartridge with respect to the camera.
40. An apparatus adapted to use a cartridge including an image
recording medium, a first operation portion and a second operation
portion functionally connected with respective ends of the
cartridge cover of the cartridge, the apparatus comprising:
a prevention device that prevents a cartridge from being unloaded
from the apparatus when a portion of the image recording medium is
exited from the cartridge;
a disabling device that is selectively operable to disable an
operation of said prevention device when a portion of the image
recording medium is exited from the cartridge; and
a driving device that drives the first operation portion to perform
at least one of an opening operation and a closing operation of the
cartridge cover of the cartridge,
wherein said prevention device performs at least one of a
prevention operation and a release operation of the prevention
device in connection with a driving operation of the second
operation portion driven by the first operation portion driven by
said driving device.
41. An apparatus according to claim 40, wherein the image recording
medium comprises a film.
42. An apparatus according to claim 40, wherein the cartridge
comprises a cartridge cover functionally connected to the image
recording medium for allowing the image recording medium to exit
from the cartridge.
43. An apparatus according to claim 40, wherein said prevention
device comprises a tab that prevents an opening operation of an
apparatus body cover which allows the cartridge to be unloaded from
the apparatus.
44. An apparatus according to claim 40, wherein said prevention
device comprises a release device that releases the tab of the
prevention device in connection with a closing operation of the
cartridge cover of a cartridge loaded in the apparatus.
45. An apparatus according to claim 40, wherein said prevention
device comprises means for functionally opposing said disabling
device.
46. An apparatus adapted to use a cartridge including an image
recording medium, the cartridge having a cartridge cover that opens
and closes to permit the image recording medium to exit from or
withdraw into the cartridge and having first and second operation
portions functionally connected with respective ends of the
cartridge cover, the apparatus comprising:
a driving device that drives the first operation portion to
selectively perform one of an opening operation and a closing
operation of the cartridge cover of the cartridge; and
an operation member that performs a predetermined operation, said
operation member being driven by a driving operation of the second
operation portion, which is driven by the first operation portion
driven by said driving device.
47. An apparatus according to claim 46, wherein said operation
member comprises a prevention device that prevents at least one of
a loading operation and an unloading operation of the cartridge
with respect to the apparatus.
48. An apparatus according to claim 47, wherein said prevention
device comprises a tab that prevents an opening operation of an
apparatus body cover for allowing at least one of the loading
operation and the unloading operation of a cartridge with respect
to the apparatus.
49. An apparatus adapted to use a cartridge including an image
recording medium, the cartridge further including a light shield
portion movable between an open state and a closed state to permit
an image recording medium to exit from or withdraw into the
cartridge, a first operation portion and a second operation portion
functionally connected with respective ends of the light shield
portion, the apparatus comprising:
a prevention device that prevents a cartridge from being unloaded
from the apparatus when the light shield portion of the cartridge
loaded in the apparatus is open;
a disabling device that is selectively operable to disable an
operation of said prevention device when the light shield portion
of the cartridge loaded in the apparatus is open; and
a driving device that drives the first operation portion to perform
at least one of an opening operation and a closing operation of the
light shield portion of the cartridge,
wherein said prevention device comprises a tab that performs at
least one of a prevention operation and a release operation of the
prevention device in conjunction with a driving operation of the
second operation portion driven by the first operation portion
driven by said driving device.
50. An apparatus according to claim 49, wherein the image recording
medium comprises a film.
51. An apparatus according to claim 49, wherein said prevention
device comprises a tab that prevents an opening operation of an
apparatus body cover which allows the cartridge to be unloaded from
the apparatus.
52. An apparatus according to claim 49, wherein said prevention
device comprises a release device that releases an operation of
said prevention device in conjunction with a closing operation of
the light shield portion of the cartridge loaded in the
apparatus.
53. An apparatus according to claim 49, wherein said prevention
device comprises means for functionally opposing said disabling
device.
54. An apparatus adapted to use a cartridge including an image
recording medium, the cartridge having a light shield portion for
shielding the image recording medium from external light and having
first and second operation portions functionally connected with
respective ends of the light shield portion, the apparatus
comprising:
a driving device that drives the first operation portion to
selectively perform one of an opening operation and a closing
operation of the light shield portion of the cartridge; and
an operation member for performing a predetermined operation, said
operation member being driven by a driving operation of the second
operation portion, which is driven by the first operation portion
driven by said driving device.
55. An apparatus according to claim 54, wherein said operation
member comprises a prevention device that prevents at least one of
a loading operation and an unloading operation of the cartridge
with respect to the apparatus.
56. An apparatus according to claim 55, wherein said prevention
device comprises a tab that prevents an opening operation of an
apparatus body cover for allowing at least one of the loading
operation and the unloading operation of a cartridge with respect
to the apparatus.
57. A unit applied to at least one of a camera and an apparatus
adapted to use a cartridge including an image recording medium, the
cartridge further including a light shield portion movable between
an open state and a closed state to permit the image recording
medium to exit from or withdrawn into the cartridge, a first
operation portion and a second operation portion functionally
connected with respective ends of the light shield portion, the
unit comprising:
a prevention device that prevents a cartridge from being unloaded
from the unit when the light shield portion of the cartridge loaded
in at least one of the camera and the apparatus is open;
a disabling device that is selectively operable to disable an
operation of said prevention device when the light shield portion
of the cartridge loaded in the at least one of the camera and the
apparatus is open; and
a driving device that drives the first operation portion to perform
at least one of an opening operation and a closing operation of the
light shield portion of the cartridge,
wherein said prevention device comprises means for performing at
least one of a preventing operation and a release operation of the
prevention device in conjunction with a driving operation of the
second operation portion driven by the first operation portion
driven by said driving device.
58. A unit according to claim 57, wherein the image recording
medium comprises a film.
59. A unit according to claim 57, wherein said prevention device
comprises a tab that prevents an opening operation of a unit body
cover which allows the cartridge to be unloaded from the at least
one of the camera and the apparatus.
60. A unit according to claim 57, wherein said prevention device
comprises a release device that releases an operation of said
prevention device in conjunction with a closing operation of the
light shield portion of the cartridge loaded in the at least one of
the camera and the apparatus.
61. A unit according to claim 57, wherein said prevention device
comprises means for functionally opposing said disabling
device.
62. A unit applied to at least one of a camera and an apparatus
adapted to use a cartridge including an image recording medium, the
cartridge having a light shield portion for shielding the image
recording medium from external light and having first and second
operation portions functionally connected with respective ends of
the light shield portion, the unit comprising:
a driving device that drives the first operation portion to
selectively perform one of an opening operation and a closing
operation of the light shield portion of the cartridge; and
an operation member that performs a predetermined operation, said
operation member being driven by a driving operation of the second
operation portion, which is driven by the first operation portion
driven by said driving device.
63. A unit according to claim 62, wherein said operation member
comprises a prevention device that prevents at least one of a
loading operation and an unloading operation of the cartridge with
respect to the at least one of the camera and the apparatus.
64. A unit according to claim 63, wherein said prevention device
comprises a tab that prevents an opening operation of a unit body
cover for allowing at least one of the loading operation and the
unloading operation of a cartridge with respect to the at least one
of the camera and the apparatus.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an improvement in a camera adapted
to use a film cartridge having a movable light shield door.
2. Related Background Art
Cameras each having a movable light shield door opening/closing
device for opening/closing a movable light shield door formed on a
film cartridge are disclosed in Japanese Laid-Open Patent
Application Nos. 1-191836 and 1-191837. In these prior arts, when a
switch for detecting if a cartridge chamber cover is closed detects
that the cartridge chamber cover is closed, a movable light shield
door is opened, and a film is extracted via the movable light
shield door to prevent film exposure. After a predetermined period
of time has elapsed from the end of the rewind operation of a film,
if the movable light shield door remains open, an alarm is
generated. Furthermore, the prior art describes an embodiment which
prevents inadvertent exposure of a film by inhibiting the cartridge
chamber cover from being opened when the movable light shield door
is open.
A movable light shield door is also disclosed in U.S. Pat. No.
4,938,429. In this reference, a light shield door is opened/closed
by pivoting a rotatable shaft.
In the above-mentioned prior arts, an operation member for
opening/closing the cartridge chamber cover of a camera is locked
while the movable light shield door is open. A lock member for
locking the operation member is operated integrally with the
movable light shield door by the driving force from a motor. In
this arrangement, if the movable light shield door cannot be
mechanically closed due to some accident (for example, the motor is
locked or a film portion is extracted from a cartridge), the lock
member cannot be operated even if the lock member can be forcibly
externally operated.
Therefore, in the above-mentioned prior art, when the movable light
shield door cannot be closed due to some accident, the cartridge
chamber cover of the camera can never be opened, and the film
cartridge cannot be unloaded.
SUMMARY OF THE INVENTION
One aspect of the present invention is to provide a camera or
apparatus adapted to use an image recording medium cartridge having
a cover for allowing an image recording medium to exit from or
withdraw into the image recording medium cartridge, or a device
adapted in the camera or apparatus, which camera or apparatus
comprises inhibition means for inhibiting the cartridge from being
unloaded from the camera or apparatus cartridge loaded in the
camera or apparatus is open, and disabling means for disabling an
operation of the inhibition means when the cover of the cartridge
loaded in the camera or apparatus is open, which camera or
apparatus allows the cartridge to be unloaded from the camera or
apparatus even when the cover of the cartridge loaded in the camera
or apparatus is kept open and cannot be closed due to some
accident.
Other aspects of the present invention will become apparent from
the following description of the preferred embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view showing the outer appearance of a
camera according to the first embodiment of the present
invention;
FIGS. 2A and 2B are perspective views showing the mechanical
arrangements of principal portions of the camera shown in FIG.
1;
FIGS. 3A and 3B are plan views showing a state wherein an operation
member shown in FIG. 1 is operated;
FIGS. 4A and 4B are sectional views showing a state wherein the
operation member shown in FIG. 1 is operated; and
FIG. 5 is a perspective view showing the mechanical arrangement of
principal portions of a camera according to the second embodiment
of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The embodiments of the present invention will be described below
with reference to the accompanying drawings.
FIGS. 1 to 4B show the first embodiment of the present invention,
and FIG. 1 is a perspective view showing the outer appearance of a
camera according to the first embodiment of the present
invention.
Referring to FIG. 1, the camera includes a camera main body 1, a
phototaking lens 2, a shutter button 3, a view finder 4, a
cartridge chamber cover 5 which opens/closes a cartridge chamber
arranged in the camera main body 1 and allows loading/unloading of
a film cartridge (to be described later), and a hinge shaft 6 which
rotatably couples the cartridge chamber cover 5 to the camera main
body 1, and allows opening/closing of the cartridge chamber. The
camera also includes an operation member 7 for opening/closing the
cartridge chamber cover 5, and a release button 8 for releasing a
locked state of the operation member 7 in an emergency state.
Furthermore, the camera includes a notch 5a for allowing the
operation member 7 to be slidable, and a hole 5b for operating the
release button 8.
FIGS. 2A and 2B are perspective views showing the mechanical
arrangements of principal portions of the camera.
Referring to FIGS. 2A and 2B, the camera includes a film cartridge
101 which is loaded in the cartridge chamber in the camera main
body 1 and stores a film, a shaft 102 used for feeding a film in
the film cartridge 101, and an engaging portion 103 for
opening/closing a movable light shield door of the film cartridge
101. The engaging portion 103 integrally has engaging grooves 103a
and 103b at the two end portions of the film cartridge 101. The
camera also includes a movable light shield door 104 for
opening/closing a film exit/entrance opening of the film cartridge
101, a film 105 with perforations 106, a spool 107 for taking up
the film 105, and a photoreflector 108 for detecting the
perforations 106 of the film 105. The camera further includes a
power transmission fork 109 which is engaged with the film feed
shaft 102 in the loaded film cartridge 101 to feed (push out) the
film 105 from the film cartridge 101 or to rewind the film.
Moreover, the camera includes a power transmission mechanism 110
for transmitting power to the fork 109 and the take-up spool 107, a
film feed motor 111, and an output gear 112, of the film feed motor
111, for transmitting the output from the film feed motor 111 to
the power transmission mechanism 110.
The operation member 7, which is partially shown in FIG. 1, is
constituted by the following members 7a to 7d (the cartridge
chamber cover 5 is not shown in FIGS. 2A and 2B).
That is, the operation member 7 is constituted by an operation
portion 7a, a pawl portion 7b which is engaged with an engaging
portion (not shown) provided to the camera main body 1 to hold the
cartridge chamber cover 5 in a closed state, a lock portion 7c for
locking the operation member 7 in an inoperable state, and an
electrical contact 7d on the operation member 7. When the operation
member 7 is operated by moving it in a direction to close the
cartridge chamber cover 5, the electrical contact 7d is
electrically connected to a cartridge chamber cover opening/closing
detection switch 17, i.e., the cartridge chamber cover
opening/closing detection switch 17 is turned on.
A lock member 9 is used for setting the operation member 7 in an
inoperable state, and has a flat round hole 9a and a lock pawl 9b
to be engaged with the lock portion 7c of the operation member 7. A
driven member 10 is engaged with the engaging portion 103 provided
to the film cartridge 101, and has a flat round engaging portion
10a which is engaged with the flat round hole 9a of the lock member
9, and an engaging pawl 10b which is engaged with the engaging
groove 103a of the engaging portion 103.
A spring 11 is arranged between the lock member 9 and the driven
member 10 to push up the lock member 9 from the lower side and to
push down the driven member 10 from the upper side. When the
release button 8 is depressed, the lock member 9 can be swung in
the vertical direction upon operation of the spring 11. Even when
the engaging pawl 10b of the driven member 10 cannot be
satisfactorily engaged with the engaging groove 103a of the
engaging portion 103, the discrepancy can be absorbed by the spring
11, and later, the engaging pawl 10b can be satisfactorily engaged
with the engaging groove 103a upon pivotal movement of the movable
light shield door 104.
A driving member 12 is engaged with the engaging portion 103, and
has an engaging pawl 12a to be engaged with the engaging groove
103b and an electrical contact 12b arranged on a circumference
having the rotational shaft of the driving member 12 as the center.
A movable light shield door opening/closing detection switch 13 is
electrically connected to the electrical contact 12b of the driving
member 12, i.e., is turned on when the movable light shield door
104 is open while the film 105 is extracted from the film cartridge
101, as shown in FIG. 2A (in FIG. 2B, the movable light shield door
104 is closed).
A power transmission mechanism 14 is used for driving the driving
member 12. A motor 15 opens/closes the movable light shield door
via an output gear 16 for transmitting an output from the movable
light shield door opening/closing motor 15 to the power
transmission mechanism 14.
FIGS. 3A and 3B are plan views showing a state wherein the
operation member 7 is operated.
FIG. 3A shows a state wherein the cartridge chamber cover 5 can be
opened. In this state, the operation member 7 is located at a
position where the cartridge chamber cover 5 can be opened about
the hinge shaft 6 shown in FIG. 1, and the lock member 9 is located
at a position where the movable light shield door 104 is
closed.
FIG. 3B shows a state wherein the cartridge chamber cover 5 is
closed. When the operation portion 7a of the operation member 7 is
slid in the direction of an arrow in FIG. 3B, the pawl portion 7b
is engaged with the engaging portion (not shown) provided to the
camera main body 1, and the cartridge chamber cover 5 is held in a
closed state.
When the cartridge chamber cover 5 is closed, as described above,
the cartridge chamber cover opening/closing detection switch 17
shown in FIGS. 2A and 2B is turned on, and the movable light shield
door opening/closing motor 15 is started by a motor control circuit
(not shown), thereby opening the movable light shield door 104 via
the driving member 12. At this time, the engaging pawl 10b of the
driven member 10, which is engaged with the engaging groove 103a of
the engaging portion 103 is pivoted counterclockwise to follow the
movement of the movable light shield door 104. Then, the pivot
force is transmitted to the flat round hole 9a coaxially engaged
with the flat round engaging protion 10a, and the lock member 9 is
pivoted counterclockwise. With this operation, the lock pawl 9b is
engaged with the lock portion 7c, and locks the operation member 7
at a position for inhibiting the cartridge chamber cover 5 from
being opened, so that the film 105 in the loaded film cartridge 101
can be prevented from being inadvertently exposed by opening the
cartridge chamber cover 5 (see FIG. 3B).
FIGS. 4A and 4B are sectional views showing a state wherein the
operation member 7 is operated.
FIG. 4A corresponds to the state shown in FIG. 3A, and shows a
state wherein the cartridge chamber cover 5 is openable. In this
state, the release button 8 is not depressed, and the lock member 9
is pushed upward by the spring 11. Note that the release button 8
is preferably arranged at a level equal to or lower than that of
the surface of the cartridge chamber cover 5 so as not to be
inadvertently operated (depressed) in a state other than an
emergency state, thus preventing inadvertent exposure.
When the operation member 7 is slid in the direction to hold the
closed state of the cartridge chamber cover 5 from the state shown
in FIG. 4A, the movable light shield door 104 is opened, and the
driven member 10 and the lock member 9 are pivoted to follow the
movement of the door. The lock pawl 9b is engaged with the lock
portion 7c to lock the operation member 7 at a position for
inhibiting the cartridge chamber cover 5 from being opened, as
described above. In this state, as shown in FIG. 4B, when an
emergency has occurred such that the movable light shield door will
not be closed due to some accident and the film cartridge 101
cannot be extracted, the release button 8 is depressed in the
direction of an arrow in FIG. 4B, so that the lock member 9 is
pushed down integrally with the release button 8 against the
biasing force of the spring 11, the lock pawl 9b is moved in the
thickness direction of the lock portion 7c, and the engagement
between the lock pawl 9b and the lock portion 7c is released.
In this state, the operation member 7 becomes operable, and the
cartridge chamber cover 5 can be opened to extract the film
cartridge 101 by sliding the operation member 7 in a direction to
open the cartridge chamber cover 5.
In the first embodiment, the release button 8 and the lock member 9
are separately arranged but may be integrally arranged. If the lock
member 9 or the driven member 10 is provided with a weak spring for
biasing in the clockwise direction, the engaging pawl 10b can be
reliably engaged with the engaging groove 103a of the engaging
portion 103 when the movable light shield door 104 is closed.
The second embodiment of the present invention will be described
below.
FIG. 5 is a perspective view showing the mechanical arrangement of
principal portions of a camera according to the second embodiment
of the present invention, and the same reference numerals in FIG. 5
denote the same parts as in FIGS. 2A and 2B.
In the first embodiment, the locked state is released by depressing
the lock release mechanism (the release button 8 and the lock
member 9) in the thickness direction. However, in the second
embodiment, the locked state is released by rotating the lock
release mechanism clockwise.
Referring to FIG. 5, a driven member 50 of the engaging portion 103
has an engaging hole 50a to be pivotally engaged with a lock member
(to be described later), an engaging pawl portion 50b to be engaged
with the engaging groove 103a of the engaging portion 103, and a
friction surface 50c to which a friction spring (to be described
later) is attached. A lock member 60 is used for locking the
operation member 7 in an inoperable state. The lock member 60 has
an engaging shaft 60a to be pivotally engaged with the engaging
hole 50a of the driven member 50, a locking hole 60b for locking
one end of a friction spring (to be described later), a lock pawl
60c to be engaged with the lock portion 7c of the operation member
7, and a groove 60d capable of receiving a "plus" (Phillips head)
screwdriver to allow, e.g., the plus screwdriver to pivot the lock
member 60 in only an emergency state. A clockwise friction spring
70 has an engaging portion 70a at which the friction spring 70 is
locked.
The operation of the lock release mechanism with the above
arrangement will be described below.
When the movable light shield door 104 is opened, the driven member
50, which is engaged with the engaging portion 103, is pivoted
counterclockwise. At this time, since the friction spring 70 has a
clockwise turn, which corresponds to a loosening direction with
respect to the driven member 50, the driven member 50 and the
friction member 70 are rotated idle. However, since the driven
member 50 and the friction spring 70 generate, therebetween, a
friction large enough to pivot the lock member 60, the lock member
60 is rotated counterclockwise as is the driven member 50. In this
state, the lock pawl 60c of the lock member 60 is engaged with the
lock portion 7c to lock the operation member 7 at a position for
inhibiting the cartridge chamber cover 5 from being opened.
When the movable light shield door 104 is closed, the driven member
50 is pivoted clockwise. At this time, the friction spring has a
fastening direction with respect to the driven member 50, and the
lock member 60 is integrally pivoted clockwise, thus setting the
operation member 7 in an operable state.
When the movable light shield door 104 cannot be closed from an
open state due to some accident, a plus screwdriver may be inserted
in the groove 60d of the lock member 60 and pivoted clockwise.
Since the movable light shield door 104 is not closed due to the
interference of the film 105 present at the film port, the driven
member 50 and the friction spring 70 slip, and only the lock member
60 is pivoted clockwise, thus allowing the operation member 7 to be
operable. As a result, the cartridge chamber cover 5 can be opened.
In this case, since the friction spring 70 is pivoted in a
direction to release spring bias or tension, the movable light
shield door 104 will not strongly push the film 105 even if it
bites the film 105, thus preventing the film 105 from being
damaged.
Note that the groove 60d is a groove capable of receiving a plus
screwdriver. However, the groove 60d may be any other grooves such
as a "minus" (flat head) groove, an L-groove, and the like as long
as the lock member 60 can be externally pivoted. Alternately, in
place of a groove, a projection may be formed. That is, the groove
60d need only have a shape which prevents inadvertent operation,
and thereby prevents inadvertent exposure in a state other than an
emergency state.
According to each of the above embodiments, upon loading the film
cartridge 101, a driving system for driving the engaging groove
103b is arranged at an engaging groove 103b side of the engaging
grooves 103a and 103b at the two end portions of the film cartridge
101, and the lock members 9 and 60 driven by the engaging groove
103a are arranged at the engaging groove 103a side. For this
reason, a mechanism having a relationship between the driving and
driven sides properly utilizing the engaging grooves 103a and 103b
at the two end portions of the film cartridge 101 can be arranged
with a high space efficiency and a high degree of design freedom.
Note that an arrangement mechanism other than lock members 9 and 60
may be arranged at the driven side to perform a predetermined
operation.
Even when the movable light shield door 104 cannot be closed, the
operation member 7 for opening/closing the cartridge chamber cover
5 can be operated by the lock release means (the release button 8
or the groove 60d capable of receiving a plus screwdriver) of the
lock member 9 or 60. For this reason, if this operation is
performed in, e.g., a dark room, the film cartridge 101 can be
unloaded from the camera main body 1 without exposing the film
105.
In the present invention, operations to be manually performed in
each of the above embodiments may be realized electrically.
In the present invention, the above embodiments or their technical
elements may be combined as needed.
The present invention can be applied to a device which uses a
cartridge having a movable light shield door or the like, which has
a shape other than that described in the above specification.
The present invention can be applied to image recording media other
than a film.
The present invention can be applied to a device which uses a
cartridge of a type other than that described in the above
specification, a cartridge having an image recording medium other
than a film, various other cartridges, and a member to be loaded
other than a cartridge.
In the present invention, all or some of the constituent elements
of the claims or embodiments may constitute a single device, a
device to be combined with another device, or an element
constituting a device.
The present invention can be applied to various types of cameras
such as a single-lens reflex camera, a lens shutter camera, a video
camera, and the like, optical equipment or apparatuses other than a
camera, a device adopted in these cameras, optical equipment, or
apparatuses, or an element constituting these.
The individual components shown in schematic or block form in the
drawings are all well-known in the camera arts and their specific
construction and operation are not critical to the operation or
best mode carrying out the invention.
While the present invention has been described with respect to what
is presently considered to be the preferred embodiments, it is to
be understood that the invention is not limited to the disclosed
embodiments. To the contrary, the invention is intended to cover
various modifications and equivalent arrangements included within
the spirit and scope of the appended claims. The scope of the
following claims is to be accorded the broadest interpretation so
as to encompass all such modifications and equivalent structures
and functions.
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